Hidden-Fastener fence

ABSTRACT

A hidden-fastener fence is disclosed, which features wavelike seizing surfaces on the opposite inner walls of horizontal tubes of the fence. And wavelike embedding verges are set up at both sides of horizontal plate of a fixing bar to fit in the seizing surfaces of the horizontal tube. Accordingly, the joining of the embedding verges at the both sides of the horizontal plate of the fixing bar and the seizing surfaces of the corresponding inner walls of the horizontal tube would prop the bottom opening of the horizontal tube outward, which considerably boosts the structural strength of the bottom opening of the horizontal tube, and the wavelike seizing surfaces on the inner walls of the horizontal tube further fortifies the rigidity of the horizontal tube.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates generally to hidden-fastener fences and more particularly to one that is able to boost rigidity of the structure of horizontal tubes.

2. Description of the Prior Art

Fences are usually made up of multiple vertical and horizontal tubes that are intersecting to each other, where the intersection of each vertical tube and each horizontal tube is further fixed firmly by a fastener. To beautify the appearance of the whole fence, this inventor has endeavored to improve the hidden-fastener structure, and that efforts brought him a patent, U.S. Pat. No. 7,384,025. The inventor now made another improvement on the hidden-fastener fence again, which substantially boosts the rigidity of the structure of the hidden-fastener fence.

SUMMARY OF THE INVENTION

This invention is characterized mainly as: wavelike seizing surfaces are provided on the inner walls of a horizontal tubes, a L-type fixing bar is embedded in its bottom opening, and embedding verges at both sides of the bottom of the fixing bar are to clasp firmly with seizing surfaces of the horizontal tubes; a separated interval is kept in between top outer side of the vertical plate of the fixing bar above the embedding verge and the inner wall of the horizontal tube; a horizontal plate of the fixing bar is provided with a bore at the location corresponding to each vertical tube that penetrates, which offers the means that the fixing bar can intersect and join each vertical tube through the helical joining by the fastener; the seizing surfaces on the inner walls of the bottom opening of the horizontal tube clasps the embedding verges at both sides of the horizontal plate of the fixing bar. Accordingly, the joining of the embedding verges at the both sides of the horizontal plate of the fixing bar and the seizing surfaces of the corresponding inner walls of the horizontal tube would prop the bottom opening of the horizontal tube outward, which considerably boosts the structural strength of the bottom opening of the horizontal tube, and the wavelike seizing surfaces on the inner walls of the horizontal tube further fortifies the rigidity of the horizontal tube.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three-dimensional assembled view of the exemplary embodiment of this invention;

FIG. 2 is a front view of the exemplary embodiment of this invention;

FIG. 3 is a partially exploded view of the exemplary embodiment of this invention;

FIG. 4 is a sectional view seeing from the line 4-4 of FIG. 2;

FIG. 4A is an enlarged view of the portion A of FIG. 4;

FIG. 4B is an enlarged view of the portion B of FIG. 4; and

FIG. 4C is an enlarged view of the portion C of FIG. 4.

DETAILED DESCRIPTION OF THE INVENTION

To achieve the foregoing objects and function of the present invention, the techniques and structure adopted are described with reference to the following preferred embodiments.

Referring to FIGS. 1˜3, fence 1 is made up of multiple horizontal tubes 10 and vertical tubes 20, where both are vertically intersecting to each other, and an axial fixing bar 30 is provided in each horizontal tube 10, which is used to join fixedly with a vertical tube 20 by a fastener, wherein,

a horizontal tube 10, is provided with an opening 11 at its bottom, and wavelike seizing surfaces 12 at its corresponding inner walls. Besides the horizontal tubes 10 at the utmost of the fence 1, each horizontal tube 10 is provided with a hole 13 (shown in FIG. 4B) at the position corresponding to the vertical tubes 20, which is for the penetration of the horizontal tube 10 by the vertical tubes 20 through it 13; a fixing bar 30, L-shaped, is provided with a horizontal plate 31 and a vertical plate 32, where both outer sides of the horizontal plate 31, fit in the seizing surfaces 12 of the horizontal tube 10, have wavelike embedding verges 33. Corresponding to the location of each vertical tube 20, a bore 34 is set up for the penetration by the vertical tube 20. The thickness of the vertical plate 32 at the top of the embedding verge 33 of the horizontal plate 31 is diminished, where the diminished width D is just same to the thickness of the nut of the fastener 40. The vertical plate 32 has a through hole 35 corresponding to each vertical tube 20, where the through hole 35 is for the penetration by the fastener 40 to join fixedly with tube wall of the vertical tubes 20. And that enables the fixing bar 30 to intersect each vertical tube 20 in a firm joining.

During Assembly:

-   -   1. Place each horizontal tube 10 at top of each fixing bar 30.         And each vertical tube 20 is taken to penetrate the         corresponding bore 34 of horizontal plate 31 of the fixing bar         30 and the corresponding hole 13 of the horizontal tube 10.     -   2. Penetrate a fastener 40 through the through hole 35 of the         vertical plate 32 of the fixing bar 30 to fasten the vertical         tube 20.     -   3. Press the horizontal tube 10 down for lodging the fixing bar         30 into its bottom opening 11, fit embedded verges 33 at both         sides of the horizontal plate 31 of the fixing bar 30 in seizing         surfaces 12 of the opening 11 of the horizontal tube 10, where         the horizontal plate 31 of the fixing bar 30 sufficiently prop         the opening 11 of the horizontal tube 10. And the exterior of         the horizontal tube 10 is nothing but tube surfaces, which         substantially enhances the strength of the horizontal tube 10,         where the fasteners 40 are covered and hidden in the horizontal         tubes 10.

Accordingly, this invention is characterized by the hidden fasteners 40 in the horizontal tubes 10, the horizontal plate 31 of the fixing bar 30 propping the bottom opening 11 of the horizontal tube 10, and the setting of the wavelike seizing surfaces 12 on the inner walls of the horizontal tubes 10, which has better rigidity over the prior art so as to substantially fortify the structural strength of the horizontal tubes 10.

To sum up, the present invention is construed as not only novel but useful, thereby filing the present application herein subject to the patent law, which may obtain a patent thereof. 

1. A hidden-fastener fence, made up of a plurality of horizontal tubes and vertical tubes, where both are vertically intersecting to each other, and an axial fixing bar being provided in each horizontal tube, which is used to join fixedly with a vertical tube by a fastener, wherein, a.) a horizontal tube, having an opening at its bottom, and a hole at the location corresponding to each vertical tube, where the hole is used for the penetration of the horizontal tube by the vertical tube; b.) a fixing bar, having a horizontal plate and a vertical plate, where the horizontal plate is provided with a bore, corresponding to the location of each vertical tube, for the penetration by the vertical tube through it; and a through hole, corresponding to the tube wall of each vertical tube, at the vertical plate, for the penetration by a fastener to join fixedly with tube wall of the vertical tube through it, which enables the fixing bar to intersect each vertical tube in a firm joining, the improvement comprising: wavelike seizing surfaces being set up on the opposite inner walls of the horizontal tube, and wavelike embedding verges being set up at both outer sides of the horizontal plate of the fixing bar to fit in the seizing surfaces of the horizontal tube.
 2. A hidden-fastener fence as in claim 1 wherein the fixing bar is L-shaped.
 3. A hidden-fastener fence as in claim 1 wherein the thickness of the vertical plate at the top of the embedding verge of the horizontal plate of the fixing bar is diminished, and the diminished width being just same to the thickness of the nut of the fastener. 